400156720

素因数分解:

$2^4\times 5^1\times {\mathrm{19}}^1\times {\mathrm{41}}^1\times {\mathrm{6421}}^1$

素因数の和:6494

約数の個数: 80

約数和(自身を含む): 1003373280

約数和(自身を除く): 603216560

約数列:

[1, 2, 4, 5, 8, 10, 16, 19, 20, 38, 40, 41, 76, 80, 82, 95, 152, 164, 190, 205, 304, 328, 380, 410, 656, 760, 779, 820, 1520, 1558, 1640, 3116, 3280, 3895, 6232, 6421, 7790, 12464, 12842, 15580, 25684, 31160, 32105, 51368, 62320, 64210, 102736, 121999, 128420, 243998, 256840, 263261, 487996, 513680, 526522, 609995, 975992, 1053044, 1219990, 1316305, 1951984, 2106088, 2439980, 2632610, 4212176, 4879960, 5001959, 5265220, 9759920, 10003918, 10530440, 20007836, 21060880, 25009795, 40015672, 50019590, 80031344, 100039180, 200078360, 400156720]

約数ペア:

[(1, 400156720), (2, 200078360), (4, 100039180), (5, 80031344), (8, 50019590), (10, 40015672), (16, 25009795), (19, 21060880), (20, 20007836), (38, 10530440), (40, 10003918), (41, 9759920), (76, 5265220), (80, 5001959), (82, 4879960), (95, 4212176), (152, 2632610), (164, 2439980), (190, 2106088), (205, 1951984), (304, 1316305), (328, 1219990), (380, 1053044), (410, 975992), (656, 609995), (760, 526522), (779, 513680), (820, 487996), (1520, 263261), (1558, 256840), (1640, 243998), (3116, 128420), (3280, 121999), (3895, 102736), (6232, 64210), (6421, 62320), (7790, 51368), (12464, 32105), (12842, 31160), (15580, 25684)]